As of 04:41 CDT

St. Mary, MO weather in September

72°

St. Mary, Sunday, 9 August, 04:41

Clear. Feels like 73°. High 96°, low 72°.

Pressure30.00 inHg

Wind4.7 mph S

Humidity91%

Visibility6.2 mi

Dew point69°

See detailed hourly forecast

In September, St. Mary, MO averages a high of 79.7° and a low of 62.4°. About 2.9 inches of precipitation fall over the month (8 wet days). The record high is 99° (1971) and the record low 40.3° (1983). Normals are computed over the last 60 years.

Day	High	Low	Chance of precip.	Record high	Record low
1	84.6°	68°	33%	98.2° (2011)	53.4° (1967)
2	84°	67.5°	32%	97.2° (2011)	54.5° (1965)
3	84°	66.9°	33%	98.1° (2011)	53.6° (1974)
4	83.7°	67.1°	28%	96.1° (1999)	53.4° (1974)
5	83.1°	66°	25%	95.7° (1990)	52.2° (1974)
6	83.7°	65.5°	27%	97.3° (1990)	52° (1988)
7	83.7°	65.5°	23%	96.4° (1990)	48° (1988)
8	81.9°	65.3°	33%	95.7° (1960)	48.9° (1986)
9	81.7°	64.8°	28%	95.5° (2013)	49.5° (2024)
10	81.9°	63.9°	18%	95.9° (2013)	51.8° (1969)
11	81.7°	64°	25%	95.2° (2013)	52.7° (1969)
12	81.5°	63.9°	32%	93.9° (1980)	53.4° (1968)
13	81.5°	63.9°	20%	95.9° (1980)	48.4° (2014)
14	80.6°	63.1°	23%	99° (1971)	48.2° (2014)
15	78.8°	62.1°	30%	94.3° (2019)	47.8° (1974)
16	78.1°	62.4°	28%	93.9° (2019)	48° (1961)
17	79°	62.1°	30%	90.3° (2019)	49.8° (1984)
18	79.9°	62.1°	27%	90.9° (2019)	48.4° (1981)
19	80.1°	62.2°	28%	95° (2022)	46.6° (1973)
20	79°	61.7°	35%	96.1° (2022)	45.3° (1991)
21	78.1°	61°	28%	96.1° (2022)	43.3° (1991)
22	76.6°	60.1°	23%	92.3° (1980)	43.7° (1983)
23	75.6°	58.5°	28%	90.5° (1961)	40.3° (1983)
24	75.2°	58.3°	32%	90.1° (1961)	42.3° (1995)
25	75.9°	59°	28%	89.4° (2017)	42.4° (1965)
26	75.9°	58.3°	32%	90.5° (2017)	43.3° (2000)
27	75.6°	57.6°	23%	90.1° (1998)	43.5° (1985)
28	75.6°	57.2°	18%	90° (1971)	43.7° (1984)
29	75.4°	56.5°	20%	90.3° (1971)	43.5° (2003)
30	75.9°	57.4°	17%	92.7° (2019)	43.9° (1967)